Process for producing products of Al-Li-Mg-Cu alloys having high

Details Process for producing products of Al-Li-Mg-Cu alloys having high Process for producing products of Al-Li-Mg-Cu alloys having high

1985-03-11

1987-03-24

Dean, R.

Metal treatment

Compositions

Heat treating

148 115A, 148 127A, C22F 104

Patent

active

046523146

ABSTRACT:
The invention concerns a process for producing products of Al-base alloys essentially containing Li, Mg and Cu as main alloy elements and having a high level of ductility and isotropy. The process comprises subjecting the homogenized product to a "tepid" transformation operation at from 100.degree. to 420.degree. C. The intermediate annealing operations, if required, are carried out in the range of from 200.degree. to 550.degree. C. The rate of cooling after the intermediate annealing operations is generally kept at from 1500.degree. C./second to 30.degree. C./hour. The isotropy and ductility of the resulting products are considerably improved in comparison with the prior art processes.

REFERENCES:
patent: 4526630 (1985-07-01), Field

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